Who invented the can?
In 1959, ERNIE.C.FRAZE of DRT Company in Teton, Ohio, USA, invented a can, that is, the material of the can lid is processed to form a rivet, and the jacket is pulled up.
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Reverse osmosis pretreatment
by：Trano
2020-03-01
Quartz sand filter: the filter is filled with refined quartz sand, which mainly filters out suspended matters, large particles, some colloids, etc. in water to reduce the turbidity of raw water.
The barrel body is made of 304 stainless steel, and the filter is cleaned by manual butterfly valve (
Cleaning the filter should be carried out when the reverse osmosis main engine is shut down). General equipment cumulative work 30-
The quartz sand filter needs to be cleaned within 60 hours, and the cleaning step is backwashing 15-20 minutes, positive wash 15-
20 minutes activated carbon filter: the filter is filled with fruit shell activated carbon, which mainly filters out colloid and organic matter in adsorbed water to reduce turbidity of raw water.
The barrel body adopts 304 stainless steel internal rubber lining and manual butterfly valve to clean the filter. General equipment cumulative work 40-
The activated carbon filter needs to be cleaned for 80 hours, and the cleaning step is backwashing 15-20 minutes, positive wash 15-Natural 20 minutes
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